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自定义代码块

左下角>设置>代码块>搜索JavaScript

{
    "fori": {
        "prefix": "fori",
            "body": [
            "for (let i = 0; i < ${1:array}.length; i++) {",
            "\tconst element = ${1:array}[i];",
            "\t${2}",
            "}"
        ],
        "description": "For loop with an index"
    }
}

必备插件

Code Runner

js文件，右键，直接执行。（这玩意WebStorm自带，vscode还得下插件，太难用了)